Josiah mowek wallwilir



J. M. WALLWIN.

GAS AND AIR MIXER.

APPLICATION FILED APR-30.1918.

1,312,147. Patented Aug. 5, 1919.

JOSIAHMQWERWALLWIN, or WARWICK, ENG A j ens Ann AIR MIXER."

Specification of Letters Ifa tent.

Patented nag; 5,1919.

Application fi1edApril.30,.1918, Serial No 231,777. i I

To all whom it may 00mm: j Be it known'that I, JOSIAH Mownn WALL- wiN, a subject of the King of Great Britain and Ireland, and resident of Warwick, in

the county of Warwick, England, have invented a new or Improved Gas and Air Mixer, of which the following is, a specification.

The present invention refers to burners used for heating purposes in which the air and gas are supplied at a pressure above atmosphere, and refers more particularly to such burners employed for metal heating,

hardening and tempering furnaces and the like, the main object, being to provide a burner of the kind referred to of improved construction whereby efficient commingling of the gas and air iseilected without unduly impeding the flow of the combustible mixture, a further object being the provision of means whereby the effect of the air u'pon p p p l which they implnge and which they are in turn deflected back toward the axis of the gas (or the gas uponthe air), as; it enters the conduit, may be regulated so as to give neither a choking effect a. sucking effeet, or to give such effects if and when required to the extent desired the general result being a greater heating efficiency and a reduced consumption of gas.

The invention will be described in detail with the aid of the accompanying drawings, wherein:

Figure 1 illustrates a longitudinal section of one example of the improved burner.

Figs. 2 and 3 illustrate side and end views of detail parts separate from the burner.

a is the usual metal conduit leading to the burner head 7). Such conduit at its other end is formed with inlet branches a, a the latter being coaxial with the conduit, and the former lying at an angle thereto, as shown. Gas will preferably enter through the inlet a and air (under a pressure above atn'iosphere) through the inlet a Within the conduit is fitted a tube 0, within and upon the opposite inner sides of which are fitted one or more pairs of forwardly inclined bafiie plates cl, two pairs being shown in Fig.1. The inner edges d of the bafile plates on one side lie centrally between the like edges of the other bafiie plates. Further, the distance between one battle plate and the next, is such as" to pro- 'Vltlfi a passage, the area of which is greater tpreferahly about 25%) than the eembined With the gas and duit under pressure and passing forward to the burner head be portionof the gas and air flows over and under theedges of the areas of the gas andair inle't branchesa', o The area or thepassagefshould also be larger than the collective area of the holes 1n the burner head, so asto avoid backpressure. I

. In each baffle plate are perforations to allow some of the gas and airtopass through the plates.

i l f .1, 1, .1

an entering the conplates in a Zig Zagpath,thestream being first deflected in one direction and then in another direction, and the gas and air being thereby "thoroughly intermixed. The other portions ofthe gas and air pass through the perforations d? and are thereby also, given a zig-zag path, the holes being arranged at such an angle as to direct the gas and an.

toward the inner face of the conduit, against the conduit, where they, mingle, with the stream of gas and air passlng between the inner edges of the plates. In this way no fects as desired, the air inlet a is fitted with a tube 6, see Fig. 1, adapted to be adjusted in an axial direction and thereby to project more or less at one end into the conduit. By adjusting the tube to project say only a short distance into the conduit, the air, by spreading outward as soon as it leaves the tube, will choke or retard the free flow of" the gas, while by adjusting the tube to say the position shown in dotted lines, it will cause the air to have a slight drawing or ejecting action on the gas. To avoid either of these effects, or reduce them to a minimum, the tube will be set to the neutral position shown in full lines.

While described as serving to control the attest of the air on the gas, the tube a will serve also to controlthereifectof .the gas on the air, when the gas is supplied under high pressure. i

What I claim is 1. In pressure gas and air burners and mixing apparatus therefor a conduit, pairs of forwardly inclined and perforated baffle plates on "theoppositeinner faces of the conduit, the inner edges of the plates on one face ,lying between the inner edges of the plates onlthe other face, and the area of the "space between {the jedges of the adjoining plates being larger than the area of the gas and air inlets combined, and also larger thanthe eol leetiye area of the holes in the 'hi l s hd a' e 1 In pressure gas and air burners and mixing apparatus therefor a conduit, atube "within the conduit and pairs of forwardly inclined perforated ,plates on the opposite inner of theit lb e, yt'heinner edgefsgof the t es v One face-flying between the inner edges of the plates on the l-other face, and thearea ,of the-space between the edges of anemia Plate bein ar than h s of thegas and air inlets combined, and also larger than the enses-vagaries the holes in the burner head, substantially as herein set o h piiessure gas and air :burners and x ng apparatus therefor, a condult'having q nii r ies a and a m s' at o end and .a burner head at the other end, pairs of forwardly inclined and perforated bafiie plates onthe opposite inner faces of the conduit,

the inner edges of the plates on one face lying between the inner edges of the plates on ,the other face, and the area of the space beconverging gas and air inletsat one end and a burner head at the other end, and also having an axially ad ustable tube in one of said inlets, pairs of forwardly inchned and perforated bafiie plates on the opposite inner faces of the conduit, the inner edges of the plates on one face lying between the inneiyedges of the plates on the other face, and the area of the space between the edges of the adjoining plates being larger than the area of the gas and air inlets combined, and also larger than the collective area of the holes in the burner head, as set forth.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

JOSIAH MOWER VVALLVVIN. WVitnesses:

ERNEST HARPER, KATHLEEN M. TrioMrsoN.

- qppie a 91" $151; eaten tyre; be obtained or five cents each, by addressing the Commissioner of Patents,

' L Washington, D. G. 

